12) A biologist is studying the possible role of earthworms on the fertility of farm soils. As part of this research, the number of earthworms per acre of farmland is being estimated. During the first phase of this study, a total of 5 one-meter square samples were taken per acre. The number of earthworms in each of the five samples was carefully counted and the results used to estimate the total number of earthworms per acre. How can this estimate of the number of earthworms per acre be improved?

Ashort, vertical, solid, or fleshy stem possessed by gladiolus and which is used in reproduction is termed a . termed a .

The movement of tectonic plates in two different locations is shown below: two blocks labeled location a and location b are shown. at location a the top layer of the block shows two horizontal arrows pointing towards each other. small dunes are shown in the middle between the two arrows. the block labeled b has a vertical line in the middle. on the left of the line there is an arrow pointing down. on the right of the vertical line there is an arrow pointing up which statement is most likely true? subduction may occur in both locations. earthquakes may occur in both locations. subduction may occur in location a only and a volcanic eruption may occur in location b only. an earthquake may occur in location a only and a volcanic eruption may occur in location b only.

Can someone me with this and tell me what’s fracking and what does it have to do with carbon, carbon dioxide, or fossil fuels?